Technical Operations and R&D at JIVE Arpad Szomoru TOG, - - PowerPoint PPT Presentation

TOG, Ventspils, Latvia, May 23 2017

Arpad Szomoru

Technical Operations and R&D at JIVE

TOG, Ventspils Latvia, May23 2017

• Correlators
• More capacity, new telescopes, development of AVN, new features
• Data recording/playback/transport
• Real time/near-real time, higher bandwidths, 2 and 4Gbps
• Automated operations
• Get rid of disk shipping
• Monitoring, automated fringe checking
• Triggered observations
• SKA and mm VLBI
• User software, VLBI with CASA
• SAT architect in SaDT consortium
• Simulations for BHC
• Fringe checking
• Time and frequency transfer
• Jumping JIVE has kicked off

What do we do?

TOG, Ventspils Latvia, May23 2017

JIVE R&D

• Continued development of Jive5AB
• Many bug fixes
• New release just out
• FlexBuff recording taking off
• New machines received from Medicina, Noto, Westerbork
• Although some not quite filled to capacity..
• Wb will record directly on unit at JIVE
• Jodrell about to send one FlexBuff
• JIVE will purchase extra unit
• 8TB disks now standard
• Balancing load a bit of a challenge

TOG, Ventspils Latvia, May23 2017

More…

• 2 Gbps e-VLBI now standard
• 4 Gbps e-VLBI tested again after three (?) years
• Split data stream into separate pols in Fila10G
• Send two times 2 Gbps
• Cheated a bit: no cross pols calculated
• Irbene: just worked out of the box!

TOG, Ventspils Latvia, May23 2017

More…

• Backup machine in Dwingeloo has been expanded
• Enough expansion capacity for several years to come
• Now including experiments correlated at Bonn in central

EVN archive

TOG, Ventspils Latvia, May23 2017

JIVE UniBoard Correlator (JUC)

• JUC ready for e-VLBI
• Detailed comparison to SFXC: excellent agreement
• First attempts at real-time correlation
• But, Fila10G not quite producing data streams to specs
• Necessitated extensive re-write of control software
• “formatter” test next
• Per board:
• 32 stations at 64 MHz
• Dual pol
• 16 MHz personality fully tested
• 32 MHz more or less done
• 64 MHz personality not yet tested
• Lack of data…
• Very efficient for “simple” tasks
• On identical data streams
• Perfect geo correlator?

TOG, Ventspils Latvia, May23 2017

R&D User software development

• CASA fringe fitting
• BlackHoleCam, SKA-NL, now RadioNet RINGS
• Functional Python prototype
• Working on C++ version, adding CASA LS solver
• Eventually part of CASACore?
• Workshop after summer
• Continued support for ParselTongue
• OBELICS work package in ASTERICS
• Minimize re-calculation when changing parameters during

data reduction of large data sets

• Nice results with CASA in Jupyter

TOG, Ventspils Latvia, May23 2017

• SFXC software correlator at JIVE:
• 50 nodes; 524 cores

(Intel Xeon 5500/5600/E5-2600/E5-2630)

• At least 14 stations at 1 Gbit/s real-time
• Probably16-17 is possible
• But, not enough 1 Gbit/s e-VLBI capable stations for testing
• At least 7 stations at 2 Gbit/s + 3 stations at 1

Gbit/s real-time.

• 9-10 stations at 2 Gbit/s real-time should be possible
• Again, not properly tested
• Also because of bandwidth limits into the correlator
• Doubling of number of cores in preparation
• Retirement of some of the first generation nodes
• Overhaul of internal network at JIVE
• New switches, interconnects
• Connectivity to outside world becomes a bottleneck?

Production correlation

TOG, Ventspils, Latvia, May 23 2017

WP5 - CLEOPATRA: Connecting Locations of ESFRI Observatories and Partners in Astronomy for Timing and Real-time Alerts

• Led by JIVE
• Time and frequency transfer
• relaying alerts (warning system for transient events, also in EVN)
• data streaming software (builds on Jive5ab experience)
• advanced scheduling algorithms for complex, large arrays (mainly for SKA, CTA)

ASTERICS

TOG, Ventspils, Latvia, May 23 2017

Frequency transfer demo in CLEOPATRA

TOG, Ventspils Latvia, May23 2017

JUMPING JIVE I

• Call INFRADEV-3-2016
• Joining up Users for Maximising the Profile,

the Innovation and the Necessary Globalisation of JIVE

• Call for profiling excellent Research

Infrastructures

• Enlarging its User Participation
• Preparing for Globalisation
• Profiling JIVE ERIC
• strengthen JIVE, advocate its services and

enlarge its partnerships, in preparation for global VLBI in the SKA era

• Implemented as distributed effort
• JIVE eligible to do this as ERIC

TOG, Ventspils Latvia, May23 2017

JUMPING JIVE II

1

wp partners implementation Management JIVE support management assistant Outreach JIVE, IGN, SKAO 0.5 outreach officer New Partnerships JIVE 0.5 policy officer ERIC also for LOFAR ASTRON, JIVE, ILT policy officer, ILT management Integrating new elements IGN, JIVE Tiger team, support scientist Geodesy CNRS/BORD, JIVE Correlator support, postdoc The VLBI future INAF, JIVE, OSO Development EVN science case Global VLBI Interfaces JIVE, OSO, TUM Sched and remote telescope support Capacity in Africa UMAN, JIVE, DST, Leeds Exchange programmes VLBI with SKA JIVE, SKAO Liaison officers, VLBI WG support

TOG, Ventspils Latvia, May23 2017

JUMPING JIVE III

• Geodesy
• Produce totals from SFXC and path to geodetic software
• Verify EVN data in geodetic comparison
• Global VLBI Interfaces
• Re-factoring of SCHED
• Remote telescope monitoring
• Capacity in Africa
• Building community in SKA/VLBI countries
• Builds on UK Newton project
• VLBI with SKA
• Support for the VLBI WG
• Liaison with office, focus on operational model
• Hiring process ongoing